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(!!!!) (Best Pair #1) 12AU7A RCA USA NOS "TOP GETTER" (10/10.4ma and 10.4/10ma) 1-2% matched (similar sound to clear top) (Best USA made 12AU7)
(!!!!) (Best Pair #1) 6973 RCA NOS NOS 1969 (42ma and 42.8ma) (close Gm)
(!!!!) (Best Pair #1) 6BX7GT Sylvania triple mica "O" getter NOS 1960 era (74/66.5ma and 78.5/68.5ma) (same Gm)
(!!!!) (Best Pair #1) 6LQ6=6JE6C Raytheon Japan NOS 1970's (112ma and 109ma)
(!!!!) (Best Pair #1) 6U8A Philips by Sylvania NOS 1986 (16.2/8.5ma and 16.5/8.6ma) 1-3% matched
(!!!!) (Best Pair #1) 6U8A Philips by Sylvania NOS 1986 (16.8/8.6ma and 17.5/8.5ma) 1-3% matched
(!!!!) (Best Pair #1) 6U8A Philips by Sylvania NOS 1986 (19.0/9.8ma and 18.4/10ma) 1-3% matched (Copy)
(!!!!) (Best Pair #1) 6X5GT=VT-126B RCA black plates NOS 1943 (52-54/40 and 52-56/40)
(!!!!) (Best Pair #1) 7868 Sylvania tipped top used/tests like new 1960's (65ma and 66ma) (strong mA and Gm)
(!!!!) (Best Pair #1) 807 RCA black plate NOS 1969 (65ma and 67.3ma)
(!!!!) (Best Pair #1) EL34 Mullard UK branded Mullard and Philips XF2 NOS "O" getter 1969 (87ma and 88.6ma) (close Gm) (Best sound for the money)
(!!!!) (Best Pair #2) 01A RCA Cunningham engraved base NOS 1930's (3.3ma and 3.2ma) (same Gm)
(!!!!) (Best Pair #2) 6973 RCA NOS NOS 1969 (45.5ma and 49.6ma)
(!!!!) (Best Pair #2) 6BQ5 GE NOS 1966-1980 same build (58.5ma and 60ma)
(!!!!) (Best Pair #2) 6BX7GT Sylvania triple mica "D" getter NOS 1950's (52.2/47ma and 48/44ma)
(!!!!) (Best Pair #2) 6BX7GT Sylvania triple mica "D" getter NOS 1950's (60/55ma and 52/54ma)
(!!!!) (Best Pair #2) 6EM7=6EA7 Sylvania coin-base NOS 1970's (1.5ma/73ma and 1.8ma/65ma)
(!!!!) (Best Pair #2) 6GH8A GE by EI Yugoslavia NOS copper grid posts 1970's (16.8/12.8ma and 16.0/13.5ma)
(!!!!) (Best Pair #2) 6U8A Philips by Sylvania JAN NOS 1986 (16,8/9.0ma and 16.8/9.4ma)
(!!!!) (Best Pair #2) 6U8A Philips by Sylvania NOS 1986 (20.5/8.2ma and 20.0/8.0ma)
